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So I downloaded this very cool HDA asset file for sparks from http://www.affex.no/houdini-sparks/. Now I have some things Im trying to nail down. And hope someone can help. Now the HDA is setup with a few particle attributes that the shader can read. For some reason I cannot get energy portion to work for emission intensity amount. I have the color output working but not to sure I had it correct. I have tried several different ways after searching but still no joy. Still being quite new to Houdini Im sure there something I missed I have attached the HDA digital asset to this post. Thanks Mike sparkbox_v001.hda